What the Ratings Mean for Fit
The 5SY7416-6: The B-curve means the magnetic trip activates at 3–5× rated current — standard for resistive and general-purpose loads where inrush is modest. The 4-pole configuration switches all three phases plus neutral (though neutral conductor switching is not provided — — so the neutral pole is a switched pole only, not a switched neutral; verify your circuit's neutral switching requirement). The 15 kA (EN 60898) and 25 kA (IEC 60947-2) ratings cover most industrial panel fault levels; the higher IEC figure applies when the MCB is used as a distribution breaker per 60947-2. At DC, it breaks 15 kA at 60 V, with a maximum DC operating voltage of 72 V. Pollution degree 3 and overvoltage category III suit it for fixed industrial installations where conductive pollution or transient overvoltages are expected — typical for main distribution panels in factory environments. The IP20 rating means it is protected against solid objects over 12 mm (fingers) but not against moisture; install inside a sealed enclosure if washdown or condensation is present. Ambient temperature derating applies per: full rated current up to 55 °C at 95% humidity, then derate to 55% at 70 °C and 35% at 75 °C. Mounting position is any, and the quick-assembly fastening snaps onto standard DIN rail — 4 modular width units at 72 mm wide. Depth is 76 mm, installation depth 70 mm.
Where It's Used
Rated for mechanical engineering and industry, this MCB protects branch circuits in control panels, motor control centers, and distribution boards. The B-curve makes it a good fit for resistive loads, lighting, and small motor circuits where the inrush is under 5× rated current. The halogen-free and silicon-free construction is relevant for environments sensitive to outgassing — clean rooms, food processing, or aerospace-adjacent panels.